I just read a rant about Emacs Wiki and it’s alternative: The Wikemacs Experiment: 300 Days Later. Check out How Emacs Wiki Works for some context from my point of view. Anyway, the anonymous author says: “Maybe someone could work with Alex to add gist-style code snippets to Oddmuse, and make it so that code can be cited inline on Wiki pages, so that anyone visiting the page is automatically looking at the most up to date version of the code.”